Diesel Emissions Specialists (formerly Fox Truck & Tractor LLC) specializes in advanced after-treatment emission diagnostics and repairs. Our in-house cutting-edge DPF cleaning and testing equipment enable us for the efficient and rapid testing and cleaning of DPF, DOC, SCR, and Detroit One Box systems. Catering to do-it-yourselfers, fleet owners, and shop proprietors, we offer a comprehensive selection of industry-leading aftermarket emission products, such as new DPFs, DOCs, SCRs, temperature sensors, NOx sensors, exhaust tailpipes, clamps, gaskets, sensor bungs, and more. Additionally, we stock a range of popular parts for the trucking industry, including PDI, Jaltest Diagnostic, and various other essential components.

DPF cleaning equipment - Filtertherm

DPF Cleaning

Choosing a dependable and trustworthy DPF cleaning service is a crucial decision. Neglecting proper maintenance and cleaning of your DPF system can result in breakdowns and expensive repairs. Fortunately, preventing such disasters is straightforward through consistent maintenance, cleaning, and care for your DPF and other aftertreatment components.

Our in-house cutting-edge DPF cleaning and testing equipment enable us for the efficient and rapid testing and cleaning of DPF, DOC, SCR, and Detroit One Box systems. We will be releasing a comprehensive emission maintenance plan soon, stay tuned for more detailed information.

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DPF Filter

DPF Exchange Program

No time to wait for the DPF cleaning process? We've got you covered! Swap your clogged DPF with one from our stock that has undergone thorough cleaning and testing, backed by our 1-year warranty.

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aftertreatment emissions diagnostic

Emission Diagnostic & Repair

Our expert technicians employ state-of-the-art diagnostic tools to identify and address issues in Diesel Oxidation Catalysts (DOC), Selective Catalyst Reduction (SCR) systems, Exhaust Gas Recirculation (EGR) valves, and Diesel Particulate Filters (DPF). From precise diagnostics to tailored repair plans, we ensure your truck not only meets stringent emission standards but also operates at peak efficiency.

Being the go-to shop for any aftertreatment emission-related issues in trucks, our focus extends beyond addressing localized problems. Importantly, we aim to identify upstream engine issues to comprehensively resolve the issue at its root for all.

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detroit one box restoration

One Box Clean & Restoration

Are you encountering issues with your Freightliner Detroit DD13 or DD15? Has your Freightliner dealer suggested replacing the entire one box? You have alternative solutions! These boxes, constructed from steel, can be effectively addressed by a skilled welder and professional service. We offer comprehensive cleaning for the entire one box, covering DPFs, DOCs, and SCRs. The entire thermal cycle typically takes around 24 hours. Our fully equipped fabrication and welding station can handle repairs for your one box, including welding new bungs for sensors, addressing cracks, and fixing other damages. Contact us today to schedule your one box service appointment!

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dpf cleaning and testing

DPF/One Box Inspection

The DPF Inspection Table we have is specifically crafted for capturing accurate pre and post-cleaning measurements, including essential parameters such as flow rate and filter weight, crucial aspects of the cleaning process. Additionally, we have formulated our proprietary multi-point inspection procedure to pre-qualify Detroit One Boxes for cleaning, enhancing the likelihood of achieving maximum success in the cleaning process.

Furthermore, we furnish a DPF test record for each DPF that undergoes cleaning at our facility. This not only allows us to maintain a comprehensive record of your cleaning history but also provides you with tangible results documented on paper for your reference.

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truck inspection

Equipment Inspections

Our inspection service is a comprehensive assessment that ensures your commercial vehicles comply with safety and regulatory standards. Our skilled technicians thoroughly examine your trucks, identifying potential issues and hazards to enhance road safety.

We offer DOT inspection, comprehensive pre-purchase, post-purchase inspection, and Landstar inspection.

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dpf cleaning equipment


Unable to visit our shop? No worries! You can still receive assistance by scheduling an appointment to speak with our owner, Ryan, regarding any issues you may be facing. We can assist in truck assessment, repair tips, parts research, equipment purchase decisions, business consultation and more. Minimum 1 hour charge for each consultation session.

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NTP (national truck protection) and Premium 2000 warranty

NTP/PREMIUM 2000 Warranty

As the Preferred Repair Program provider for NTP or Premium 2000 warranty, we take pride in servicing NTP or Premium 2000 customers with any warranty claims they may have.

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Truck & Trailer Repair

Bumper-to-bumper truck and trailer repair services are exclusively reserved for existing customers. New fleets with five or more pieces of equipment also qualify for these comprehensive repair services.

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Frequently Asked Questions

We advise initiating the first cleaning after the installation of a new DPF at 250,000 miles, followed by subsequent cleanings every 150,000 miles or annually thereafter. In the case of trucks or equipment that undergo frequent idling, we recommend more frequent cleaning to ensure the ongoing cleanliness of your aftertreatment system.

Utilizing our in-house DPF cleaning equipment and technology, we can ensure a turnaround time ranging between 16 and 24 hours.

Before proceeding with cleaning, we conduct pre-tests on the majority of DPFs (please be aware that not all DPFs can be tested due to varying shapes). These pre-tests involve assessing air restriction, weight, conducting light tests, and identifying any potential cracks in the DPF.

For a single pancake shape or a similar configuration, the cost is $350 each. If the DOC is cleaned together, the total cost is $500. We strongly recommend that our customers reach out to us via phone to receive the most accurate and competitive quote for their specific needs.


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